660888099 has 8 divisors (see below), whose sum is σ = 979093520. Its totient is φ = 440592048.

The previous prime is 660888097. The next prime is 660888119. The reversal of 660888099 is 990888066.

It is not a de Polignac number, because 660888099 - 2¹ = 660888097 is a prime.

660888099 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660888097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12238642 + ... + 12238695.

It is an arithmetic number, because the mean of its divisors is an integer number (122386690).

Almost surely, 2^660888099 is an apocalyptic number.

660888099 is a deficient number, since it is larger than the sum of its proper divisors (318205421).

660888099 is a wasteful number, since it uses less digits than its factorization.

660888099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24477346 (or 24477340 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 660888099 is about 25707.7439500241. The cubic root of 660888099 is about 871.0491148851.

The spelling of 660888099 in words is "six hundred sixty million, eight hundred eighty-eight thousand, ninety-nine".